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On 12/10/2013 04:12 PM, Rick Jones wrote:
> On 12/10/2013 03:23 PM, Kotwani, Mukul wrote:
>> A new piece of data..
>>
>> We used the disable_fallocate configurable on Ubuntu, and the numbers
>> do reduce, but they are nowhere near the numbers for Redhat (5.8).
>>
>> As an example, for a specific test:
>> PUT for Ubuntu, default parameters: ~140 ops/sec
>> PUT for Ubuntu, disable_fallocate=true: ~100 ops/sec
>> PUT for Redhat 5.8, default parameters: ~15 ops/sec
>>
>> Has anyone seen this? We are not able to find anything that can
>> explain this kind of discrepancy. FYI, this is the same hardware(we
>> are switching between Ubuntu and RH, to keep things the same) and
>> software(Swift and xfs, same versions for both), same ring
>> configuration, same test scripts. It seems like Ubuntu is far ahead,
>> and we don't have any root cause ATM.  PUTs are written though to the
>> disk and not cached, so I am not sure what to attribute this to.
>
> Are RH 5.8 (2.6.32 with assorted backports)

Or is that 2.6.18 and backports?  I may have been thinking of RHEL6.

rick jones

> and what you later say is
> Ubuntu 13.04 (3.8 kernel?) using the same I/O scheduler in their drivers?
>
> rick jones
>
>
>>
>> Has anyone run Swift on RH and done comparisons with Ubuntu?
>>
>> Any help/pointers would be great!
>>
>> Thanks,
>> Mukul
>>
>>
>> -----Original Message-----
>> From: Kotwani, Mukul
>> Sent: Thursday, December 05, 2013 6:44 PM
>> To: Pete Zaitcev
>> Cc: OpenStack Mailing List
>> Subject: Re: [Openstack] [Swift] Swift on RHEL
>>
>> Thanks Pete!
>>
>> We were using Grizzly, which is over a release old, with Folsom
>> Keystone for RHEL. So not recent at all. Is there something that would
>> be missing in RHEL5.x which would cause performance issues? I saw some
>> references to fallocate, but not much beyond that. Is this something
>> you would expect to see?
>>
>> Which was the first RHEL release was Swift supported on officially?  I
>> tried to find a support matrix or supportable platforms but could not
>> find anything..
>>
>> Mukul
>>
>> -----Original Message-----
>> From: Pete Zaitcev [mailto:zaitcev at redhat.com]
>> Sent: Thursday, December 05, 2013 4:36 PM
>> To: Kotwani, Mukul
>> Cc: OpenStack Mailing List
>> Subject: Re: [Openstack] [Swift] Swift on RHEL
>>
>> On Thu, 5 Dec 2013 21:19:49 +0000
>> "Kotwani, Mukul" <mukul.g.kotwani at hp.com> wrote:
>>
>>> Has anyone used and/or deployed RHEL (5.8) with Swift?
>>> I was also looking for a "Supported platforms" for Swift, and I could
>>> not find it.
>>
>> I don't think an RDO for RHEL 5.x ever existed. First packages were
>> built a year after RHEL 6 GA shipped. The oldest build in Koji is
>> openstack-swift-1.0.2-5.fc15 (a community build by Silas), and the
>> oldest RHOS build is openstack-swift-1.4.8-2.el6 from 2012.
>>
>> Frankly I'm surprised you managed to get it running at all. (Which
>> Swift release is that, BTW? We even require PBR nowadays.)
>>
>> I dimly remember bothering with XFS for RHEL 5, but it was so long ago
>> that I cannot even remember if I got that cluster to do anything useful.
>>
>> -- Pete
>>
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>